CN2259645Y

CN2259645Y - Universal digital control power

Info

Publication number: CN2259645Y
Application number: CN 95232330
Authority: CN
Inventors: 杨维玉
Original assignee: SHENYANG INST OF COMPUTING TEC
Current assignee: SHENYANG INST OF COMPUTING TEC; Shenyang Institute of Computing Technology of CAS
Priority date: 1995-09-27
Filing date: 1995-09-27
Publication date: 1997-08-13
Anticipated expiration: 2005-09-27

Abstract

The utility model belongs to a digital power supply. The power supply is signals with +12V +5V +5VCMOS and signals with +5VPULL. The power supply is composed of a rectification filtering part, a high-frequency rectified output part, a switch voltage regulating part and a high-frequency transistor frequency raising part. After rectification, after the power supply is regulated by a voltage switch assembly (UC18432), the power supply with +12V is outputted through a field-effect tube and a high-frequency transformer, and then, through a comparator, a triode outputs the signals with +5VCMOS and the signals with +5VPULL. The utility model has the advantages of simple structure, stable and reliable work of a circuit, small size, high efficiency and low energy consumption, and therefore, the utility model is suitable for computers.

Description

The universal numerical control power supply

The utility model belongs to a kind of DCPS digitally controlled power source, is suitable for computing machine or some electronic circuit and uses.

Electronic circuits such as general computing machine have all been adopted direct supply, the generation of its direct supply is through transformer coupled by civil power 220V, the number of times output LOW voltage, through overcommutation, filtering output low-voltage dc power supply, the direct supply that precision prescribed is high also needs the direct current after the rectification is aligned through voltage stabilizing, automatically align with dedicated devices realization voltage, reach high precision output, this kind power supply weak point: adopt the large volume transformer, power consumption is big, produces difficulty, production cost height are installed, and circuit working there is harmful effect, requires inaccessible high performance device.

For solving the deficiency of above power supply power supply, the purpose of this utility model provides a kind of universal numerical control power supply, utilizes electron device and integrated circuit directly to obtain reference power supply+12V from civil power, the purpose of+5V.

The utility model universal numerical control power supply has+12V ,+5V ,+5VCMOS signal and+5V PULL signal, its circuit structure is illustrated in conjunction with the embodiments.

Fig. 1 is a universal numerical control power supply shape assumption diagram;

Fig. 2 is universal numerical control power supply+12V controlling party block diagram;

Fig. 3 is universal numerical control power supply+12V power supply electrical schematic diagram;

Fig. 4 is universal numerical control power supply+5V power supply electrical schematic diagram.

+ 12V power circuit as shown in Figure 3, its circuit is by rectification, filtering part (I), the incremental part of high frequency (II), switching voltage adjustment member (III) and high frequency transistor raising frequency part (IV) are formed, its physical circuit is by shown in Figure 3, J ₁Be electric main, through resistance R ₁With biphase rectification bridge B ₁, output plus terminal is over the ground by resistance R ₂, R ₃And capacitor C ₁, C ₂Filtering, output plus terminal connect high-frequency transformer primary winding N simultaneously ₁One of the end, N ₁The other end meets field effect transistor (Q ₁) drain electrode, source class series resistor (R ₁₂) over the ground, R ₁₂Be the very little resistance of resistance, primary winding (N ₁) series resistor (R between the two ends ₅) and backward dioded (D ₁), with resistance and be connected to electric capacity (C ₈), field effect transistor (Q ₁) grid connects single-ended Switching Power Supply Control Component (IC ₁Vc1842) output terminal (6), field effect transistor (Q ₁) source class through resistance (R ₁₁), electric capacity (C ₁₀) be connected to IC ₁The timing end (4) of assembly and reference voltage output end (8), simple winding N ₂One of the end through diode (D ₂) (D ₄) rectification, resistance (R ₁₀) electric capacity (C ₆) after the filtering connection by to IC ₁The power input of assembly (7) is simultaneously through resistance (R ₆) and divider resistance (R ₇) (R ₈) connection IC ₁The output terminal of assembly (1) and (2), high-frequency transformer auxiliary winding N ₃Through diode (D ₃) rectification, capacitor C ₁₁Be output as after the filtering+12V, by J ₂, J ₆Draw.+ 5V circuit construction of electric power as shown in Figure 4 ,+12V power supply is through electric pressure converter (DC-DC ₁) become+be two-way output behind the 5V, one tunnel output is by J ₄Leading to+the 5V power supply, other end output confession+5V CMOS and+5V PULL signal, its circuit be+the positive and negative two ends series resistor (R of 5V power supply ₁₃) and voltage stabilizing diode (LM336), middle exit connects IC ₃Comparer one input end (6), series resistor (R ₁₄) and (R ₁₅), middle exit connects comparer IC ₃Another input end (5), comparer is defeated by end (7), through backward dioded (D ₉) be connected to resistance R ₁₆, R ₁₇, R ₁₈Divide pressure side, R ₁₇, R ₁₈Branch pressure side exit is drawn and is connected triode (Q ₅) base stage, emitter is through forward diode ground connection, collector is through resistance R ₁₉, R ₂₀Be connected to Darlington Q ₃, Q ₄Base stage, Q ₃, Q ₄Emitter joins with+5V anode, and collector output is simultaneously through resistance R ₁₂, capacitor C ₁₇, C ₁₈Export Q after the filtering ₃Be that cmos signal promotes pipe, Q ₄Be that the PULL signal promotes pipe.

The circuit working principle:

As Fig. 5, R ₁₃, IC2 (LM336), C ₁₄, IC3 (LM393), D ₉Constitute and power up time-delay and power-off signal generation circuit.

Q (C9012) is the CMOS power switch, Q ₅(C1008) be Q ₃Promotion, Q ₄(C9012) be that the PULL signal promotes.

After powering up, R ₁₈, IC2 forms under-voltage circuit, output 2.5V reference voltage, and electric R ₁₃, C14 forms the RC delay circuit, makes the voltage signal of two input ends of voltage comparator 2C3 (LM393) that certain phase shift be arranged, 2C when guaranteeing to power up ₃Do not overturn, but a period of time that lags behind, after the voltage signal for the treatment of normal phase input end 5 pin surpasses the reference voltage of 2.5V, 2C ₃Just upset, by low level to exporting high level.

2C ₃When not overturning output low level, isolate D ₉Conducting, on-off circuit is blocked, and can not be in the ascent stage because of supply voltage like this, and the uncertain data mistake that causes of voltage instability and bus signals state writes.After the time-delay supply voltage was stable, IC3 exported high level, D ₉By promoting Q ₅Conducting, switching tube Q ₃, Q ₄Also conducting thereupon, confess+5VCMOS (J4i 1 pin) and+5V pull (J4i 2 pin) signal.

When power down, be that voltage low hand 4.5V (2C3i 5 pin are lower than 2.5V) in source is right, 2C3 turns over, and output is by high step-down, D ₉Conducting Q ₅End Q ₃, Q ₄End, the output of pull no signal, and+5VCMOS is battery-powered.

C in the circuit ₁₂, C ₁₃Be input filter capacitor, C ₁₇, C ₁₈Be output filter capacitor.

Advantage of the present utility model:

Adopt VC1842 as Novel current type Switching Power Supply control chip, peripheral cell is few, cost Low, can the property leaned on; Choose high frequency switch transformer, it is little, in light weight to have a volume, frequency height, low merit The core component of consumption; Adopt DC-DC (WR12S5/5000) switching device, make the input direct voltage warp Cross secondary isolation, make the power supply strong interference immunity, stability is high, and there are automatic overvoltage, overcurrent in inside Holding circuit; + 5VCMOS ,+5VPULL circuit has time-delay, and power down keeps informational function, pawns Electricity or+when the 5V power supply is lower than 90% ,+5VPULL signal no-output, and+the 5VCMOS signal is by battery Power supply keeps computerized information; + 12V/5A power acquisition VMOS switch power has power consumption Low, control the characteristics such as simple.

Claims

1. universal numerical control power supply, it is characterized in that this power supply by+12V circuit and+the 5V circuit ,+5V CMOS and+5V PULL signal forms, wherein+the 12V power circuit is J ₁Be electric main, through resistance R ₁With biphase rectification bridge B ₁, output plus terminal is over the ground by resistance R ₂, R ₃And capacitor C ₁, C ₂Filtering, output plus terminal connect high-frequency transformer primary winding N simultaneously ₁One of the end, N ₁The other end meets field effect transistor (Q ₁) drain electrode, source class series resistor (R ₁₂) over the ground, R ₁₂Be the very little resistance of resistance, primary winding (N ₁) series resistor (R between the two ends ₅) and backward dioded (D ₁), with resistance and be connected to electric capacity (C ₈), field effect transistor (Q ₁) grid connects single-ended Switching Power Supply Control Component (IC ₁Vc1842) output terminal (6), field effect transistor (Q ₁) source class through resistance (R ₁₁), electric capacity (C ₁₀) be connected to IC ₁The timing end (4) of assembly and reference voltage output end (8), simple winding N ₂One of the end through diode (D ₂) (D ₄) rectification, resistance (R ₁₀) electric capacity (C ₆) after the filtering connection by to IC ₁The power input of assembly (7) is simultaneously through resistance (R ₆) and divider resistance (R ₇) (R ₈) connection IC ₁The output terminal of assembly (1) and (2), high-frequency transformer auxiliary winding N ₃Through diode (D ₃) rectification, capacitor C ₁₁Be output as after the filtering+12V, by J ₂, J ₆Draw.

2. by the described DCPS digitally controlled power source of claim 1, it is characterized in that+the 5V power circuit is+the 12V power supply is through electric pressure converter (DC-DC ₁) become+be two-way output behind the 5V, one tunnel output is by J ₄Leading to+the 5V power supply, other end output confession+5V CMOS and+5V PULL signal, its circuit be+the positive and negative two ends series resistor (R of 5V power supply ₁₉) and voltage stabilizing diode (LM336), middle exit connects IC ₃Comparer one input end (6), series resistor (R ₁₄) and (R ₁₅), middle exit connects comparer IC ₃Another input end (5), comparator output terminal (7) is through backward dioded (D ₉) be connected to resistance R ₁₆, R ₁₇, R ₁₈Divide pressure side, R ₁₇, R ₁₈Branch pressure side exit is drawn and is connected triode (Q ₅) base stage, emitter is through forward diode ground connection, collector is through resistance R ₁₉, R ₂₀Be connected to Darlington Q ₃, Q ₄Base stage, Q ₃, Q ₄Emitter joins with+5V anode, and collector output is simultaneously through resistance R ₁₂, capacitor C ₁₇, C ₁₈Export Q after the filtering ₃Be that cmos signal promotes pipe, Q ₄Be that the PULL signal promotes pipe.